Watch this video and more on MST3K: THE GIZMOPLEX
In this recovered footage from the end of Season 12, Kinga and Max are trapped in the theater and forced to watch the classic short, MR. B NATURAL (1956).
Emily's crew watches LET'S KEEP FOOD SAFE TO EAT (1964), about how children can help keep food safe... to eat.
Test subjects watch THE BICYCLE DRIVER (1973), a short in which a young man learns to safely operate his new bike.
Emily's crew watches a short about three kids watching a short about bicycle safety, called BICYCLING VISUAL SKILLS (1980s).